Control method and control device for water medium retarder
A technology of retarder and water medium, which is applied in the field of vehicles, can solve the problems of working oil temperature rise, heat accumulation, and affecting the braking efficiency of oil medium retarder, so as to achieve the effect of ensuring reliability and improving safety
Active Publication Date: 2018-10-12
JILIN UNIV
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Problems solved by technology
[0005] However, the disadvantage of the oil medium retarder is: the heat exchange efficiency of the oil-water heat exchanger is very low, which easily leads to heat accumulation on the side of the heat exchanger and the oil, and the heat continuously generated during braking cannot be transferred to the cooling system through the heat exchanger in time. Water circulation system, so that the temperature of the working oil rises too fast, and the oil medium retarder will automatically shut down if the allowable temperature is too high. Due to the heat exchange efficiency, the oil medium retarder cannot output the braking torque for a long time
In addition, even if the oil-water heat exchanger is very well optimized, the oil-medium retarder still has structural limitations that require a heat exchanger to dissipate heat, which seriously affects the braking efficiency of the oil-medium retarder
Method used
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[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0054] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.
[0055] In the present invention, unless otherwise clearly specified...
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The invention discloses a control method and device of an aqueous medium retarder. The method comprises the following steps that the maximum output brake power value and the minimum output brake power value under the current rotation speed are obtained; an allowed brake torque value of the aqueous medium retarder is obtained; according to the maximum output brake power value, the minimum output brake power value and the brake torque value, an observer is designed, and therefore the output brake torque characteristic of the aqueous medium retarder is obtained; the braking force of the aqueous medium retarder is obtained according to the output brake torque characteristic and the vehicle brake requirement. By means of the control method, the observer is designed, so that the output brake torque characteristic is obtained, in this way, the braking force output by the aqueous medium retarder is obtained, and the purpose of controlling the aqueous medium retarder is achieved. The reliability of a cooling system is guaranteed under any working condition, and the running safety is improved.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a control method and a control device for a water medium retarder. Background technique [0002] With the development of road traffic, the speed and load of vehicles continue to increase, the driving conditions become more and more complex, and the demand for braking of vehicles becomes greater and greater. Especially for passenger cars, trucks and special vehicles, the continuous use of service brakes for a long time will cause thermal degradation, seriously affect the braking performance, and cause high-speed vehicles to fail to decelerate in time. Moreover, during the working process of the brake pad, the dust pollution caused by friction is also very serious. [0003] In non-emergency braking conditions, hydraulic retarders can be used instead of service brakes to achieve the purpose of vehicle deceleration. The hydraulic retarder converts the kinetic energy of the vehicle...
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IPC IPC(8): B60T10/00B60T8/172
CPCB60T8/172B60T10/00
Inventor 雷雨龙郑宏鹏宋鹏翔刘宇堃刘宗晟胡兴军林立峰
Owner JILIN UNIV